Shoe bearing



C. C; CALKINS SHOE BEARING May 12, 1931.

Filed Dec. '7. 1929 [15144: E CDRLK INS- Iiwentor Attorney Patented Ma y 12, 1931" UNITED STATES oneunn QCALKINS, OF sPoKANE, WASHINGTON SHOE ,IBEARING Application filed December 7, 1929. Serial No. 412,436.

My present invention relates (toimprovements in shoebearings for that class or type of agricultural machineryin which the shoe is designed 'to support infproperly aligned journals and bearings, a rotative member or rod.- This rod-must be submerged below the surfaceo'f the ground and be retained in that position'largely by the aid of said shoes, when this shoe and a' series of others, each supporting. the rotating .rod,'are advanced 1 through the soil. j

Rotary rod weeders of the general type utilizinga sub-surface rotating rod for engaging weeds or other plant growthjto remove them by the roots, and deposit them on the I'surfaceof the ground, have come into quite extensive use in many, parts of the agricultural districts'and are an important adjunctinpreparing seedbeds or maintain ing ground in .a' fallow state.

' In my present invention it is an object to provide in combination, a'shoe and bearing co-operating with a revolving rod in such a manner that the journal shall be free to rotatebeneath the surface of the soil with a minimum of friction with the soil,- and without accumulating grit or dirt infsuoh excess inl the moving parts as to seriously I 'betweenthe terminal end 18 ofthe gooseinterfere 'with the. rotative action, or cause the, unitary structure. 1 f

It is another object I of jury invention to provide replaceable parts so that when an oldpart'fbecomesl worn, afn e'w one may be substituted in a simplefand efiicient manner. It is a further object of, my invention, to provide in a shoe means for maintaining the shoe beneath the surfaceof the soilsocompanying drawingsiniwhichz undue wear-fin the se ve'ral parts comprisingj comprises certain novel featuresofconstrl' c- Figure 1 is a' fragmentary rod weeder showing the shoeoarrying the rotative rod in its approximate position in the ground when it isin'use.

- Figure 2 is a front elevation of the shoe. Figure 3 is a perspective of the shoe, a supporting goos'eneck being indicated in partthereon and also the rotative rod,

Figure 4': is a cross-sectional view-taken on line 44 of Figure 2. j

Figure 5 is a'vertical cross-section through the center of the bearings of the shoe as at line 55 of Figure 4. I Figure 6 is a plan view of the removable bearing member. v

Figure 7 is a side view thereof.

The inventionrcomprises a shoe. with a body portion lOjhaving a side socket 11 receiving the endof a gooseneck, and the shoe is fastened to the gooseneck through the expedient of suitable bolts 13 and 13' and 1111138141: and 14 g One of the bearings is shown in the shoe in advance of theterminal of the gooseneck a part 15 of which is formed integral with the shoe and a complementary part 16 forms a removable member or bearing portion that is held clamped by means of a lip or tongue 17 neck and the sidewall of the shoe.

'In ad'vance of the bearing, the shoeterminatesjin a downwardly inclined forwardly extending nose or'point 19 with a sharp front edge20 and a flaring bottom constituting a runner. This plow-pointed structure with its sharp forward edge 20 and a gradually thickening lower portion has a tendency to aid the point in entering the ground and also to maintainthe rod, which it supports, in proper relation beneath the surface of the soil.

Itisusual in rotary rod weeders to have four or five of these supporting shoes each carried by. a 'gooseneck supported by andbelow frame 21 of the weeder proper, This supporting arrangement of therod aids in aligning the rotatable rod or shaft 22, which preferably is square in cross-section and which rotates in e a counter-clockwise direc I tion with respect to its' showing in Figure 0 shape of the rod. 2'0' 1 and Figure 3. This directional movement aids to a certain extent in keeping the rod under the surface and also in pulling out the Weeds by the roots as they told backward over the advancing rod.

The shoe at its top is formed with a downwardly extending nose, and an integral, lateral 11 x23 on the nose engages over a flange 24 of the journal bushing 26 and the lip serves :to deflect the soil'xfrom the comprises the forward half of the bearing and which is integral with the shoe is made comparatively narrow, as 27 sothat a recess 28 is formed on either side of the bearing providing room to receivethe flanged journal 26. The width of the shoe in advance of the journal is su-fiicient to deflect the V earth or soil'through which the shoe is passing so that little or'none' of the soil will enter the bearing proper. .1

7 It is desirable. to make this bearing as frictionless 'as possible and since it must operate underground it is also desirable to have it as loose .and self-cleaning as possible. Since the thrust of the rod journal is imposed against the rear, removable bearing member 16, I make this member of extreme width, that is, equal to the width of the journal brushing 26,, and inthis member is provided with an arcuate groove 29 t'olrece'ive the flange 24 of "the j ournal member so that the removable bearing member or section'for-ming the rear half of the bearing assembly, not only takes the thrust andreceives'the wear of the journal, but it also .acts as a keeper for this journal bushing 26 to prevent longitudinal'movement thereof.

The removable bearing section 16 is retained byits lip 17, which'fits in a recess 30 in the sidewall of the shoe and is clamped in place by the .gooseneck and shoe when they are assembled, one of'the bolts 13se- I curing the gooseneck at its terminal "end 18 to the shoe and passing through a notch 32 cut in the end of the lip 17.

The removable and replaceable bearing section'l6 fits into the socket 11 formed in the shoe as described, and to insure proper adjustment of the section a flange 33 is provided on thesection, The upper face 34 oft-he flange is tapered to correspond with a taper illthfi Shoe so that'the 563? ing section is aligned with respect to the shoe and also to the revolving journal 24 so as to create a minimum of friction.

At 35 the end of the removable bearing member 16 is tapered somewhat and the stationary section 15 of the bearing is also tapered'to provide plenty of room for the dirt or grit toleave the bearing falling therefrom.

" lts-is essential for sub-surface bearings of this type that they be extremely loose and havea free-fitting so as not to allow soil to pack between the rotating and the nonrotating parts'tlf'o'r the reason that such packing would seriously increase the power required for .rotative movement of the rod;

It is also necessary to have a minimum of bearing surface on the forward "half of the bearing and for this purpose the bearing is cutback as much as possible-as best shown in igure 4 and thus providing very little opportunity for the dirt to pack. I v From the -foregoingdescription, taken in connection with the accompanying drawings, it is "thought the com lete structure, operation and advantages oi my invention will be readily understood'by those skilled in the art.

lVhatI claim is: K

l. A shoe bearing 'offth'e character describe'dcomprising afbody 'member having a forwardly projecting and downwardly inclined nose, a bearing formed partly integral with the body member-and partly of a re; movable section a'ligned therein, a rotatable flanged journal member in said bearing, a recess on one side of the body member to receive the flange of the journal member, a lip integral with thebody member to engage over the -flange, and means upon the removable bearing member to prevent lateral displacement of the rotatable journal.

2. In a shoe bearing, a .shoe member, a socket on the rear thereof for attachment to a gooseneck, a replaceable bearing member having a tongue, andmeans in said socket for receiving. said tongue, a forwardly projecting plow-shaped nose on said shoe member, an integral bearing portion therein c'ooperating with the replaceable bearing member, aj depression on one side of the shoe member for receiving 'thefian'ge of a loosely fitting rotatable journal member, a lipon theupward forward portion of the shoe member integral therewith and engaging over the flangeof the rotatable member, of ameans upon the replaceable bearing-for engaging the flange of the rotatable jourlnal toprev'ent longitudinal displacement of the flanged member. i j v 3 A' hearing ofthe character described comprising a shoe a bearing portion integral therewith and presenting a narrow bearing surface toja' journal'member of a removable 'fi g p PPQFW and retained in the shoe, and presenting a wide bearing surface to a journal member, and a rotatable journal member co-operating therewith.

4:. The combination with a support, of a shoe having a fixedbearing section, a complementary removable bearing section and means for clamping said section between the support and shoe, a rotatable journalbushing mounted in said sections, a retain ing flange on said bushing, and co-acting means on said sections for the flange.

5. A bearing as described comprising a shoe having a forwardly projecting and downwardly inclined nose on its forward end, said shoe having a rear socket and a support fitted in the socket, bolts for fastening the shoe to the socket, a forward bearing section integral with the shoe, a rear removable bearing section having a rear notched tongue between the shoe and support and secured by one of said bolts, a.

journal-bushing rotatable in the bearingsections, and means for retaining said bushing against lateral displacement relative to said bearing sections.

6. A bearing as described comprising a shoe having a rear, lateral socket and a support fitted in the socket, bolts fastening the shoe to the support, a forward bearing section integral with the shoe, a rear removable bearing section, an anchoring tongue on the removable section and means for securing said tongue between the shoe and support, a journal-bushing rotatable in the bearing sections, an exterior annular flange on the bushing, and said rear section having a retaining groove for said flange.

In testimony whereof I aflix my signature.

CLAUDE C. OALKINS. 

